Improvements in window sash



July 22, 1958 N. F. R. 'HEDERUS IMPROVEMENTS IN WINDOW SASH 2 Sheets-Sheet 1 Filed June 5, 1954 July 22, 1958 N. F. R. HEDERUS 7 2,843,887

IMPROVEMENTS IN WINDOW SASH Filed June a, 1954 2 Sheets-Sheet 2 2,843,887 Patented July 22, 1958 Eice IMPRQVEMENTS TN WINDOW SASH Nils Folhe Ragnar Hederus, Stockholm, Sweden Application June 3, 1954, Serial No. 434,217

Claims. (Cl. 20--52.2)

The cleaning of window sash involves particular difficulties because of the fact, that the sliding window sash cannot be cleaned while occupying its position in the stationary window frame. It has been endeavoured to solve this problem either by making the stationary window frame detachable in parts or by causing the window sash to swing outwardly about its lowermost edge, but the constructional design, specifically in connection with the facilities for guiding and operating the window sash, have been found to exhibit undue complications.

It is the object of this invention to provide such an arrangement that one single operating or actuating member may be employed both for sealingly closing the window and for enabling sliding guidance and removability of the window sash. This object is realized by the application of a window design of such nature that the window sash completely may be removed from its position in the frame and placed on the floor without removing or detaching any components of the window frame.

In its broadest aspects the invention relates to a type of sash-windows, in which the two side members of the stationary window frame are provided with guide grooves for slidingly guiding the window sash and wherein one feature of the invention consists in such a design of the sliding window sash frame, that its external contour wholly occupies a space within the internal contour of the stationary window frame, so that no parts whatsoever of the sliding frame of the window sash are in engagement with the guide grooves in the stationary window frame in order to allow complete removal of the window sash from the stationary window frame without detachment of any parts of the latter. Moreover, the frame of the window sash carries on each side a vertical latch rod having extensions which in response to a rotational setting of the latch rod in each one of three predetermined positions may be brought into engagement with the adjacent guide groove for clamping or for the purpose of sliding the sash, and again to be caused to disengage the associated groove in order to allow complete detachment of the sash from the stationary window frame. Each latch rod is associated with an actuating lever or handle being pivotally attached to the latch rod by means of an angularly positioned member, while an adjacent member thereof is guided in a recess of a fitting secured to the Window sash frame. This recess exhibits angular shape with one horizontal and one vertical portion, whereby each latch rod in response to the setting of the actuating lever to the lower end of the recess occupies its closing position with its extensions in clamping engagement with the corresponding guide groove for pressing the slidablc window sash against backing surfaces on the stationary window frame. On the other hand, when an actuating lever occupies a position within the horizontal portion of the recess in proximity of the vertical portion, the extensions of the latch rod slidingly glide along the guide groove, while the latch rod with the lever set to the terminated end of the horizontal portion of the recess occupies its state of removability with its extensions Wholly disengaged from the guide groove.

One embodiment of a sash-window according to this invention has been illustrated schematically although merely by way of an example in the accompanying draw ings, in which:

Figs. 1 and 2 diagrammatically show a front elevation of a sash-window in its closed and open state, respectively;

Fig. 3 schematically shows a side elevation of the Window, partially in vertical cross-section, with the window sash represented partly in its closed state by full lines, partly in its sliding state by short-dashed lines, and partly as detached and placed on the floor by long-dashed lines; Fig. 4 illustrates in an exaggerated scale a horizontal section through the window, at the left-hand of the drawing taken along the line IVaIV.a in Fig. 2 and along the line lVblVb in Fig. 1 at the right-hand thereof;

Fig. 5 represents in an enlarged scale as compared with Fig. 1 a frontal elevation of the left-hand section of the window sash according to Fig. 1, i. e. in its closed state, the position of the actuating lever likewise being indicated by a dash-lined circle as set so its position of removability and by a dotted circle as positioned in order to allow sliding movement of the window sash;

Fig. 6 shows an end view of the window sash in the same scale as that of Fig. 5 and as viewed in the direction toward the end edge when set to permit sliding of the window;

Figs. 7 to 10 are each representations in the same scale as Fig. 4, wherein Fig. 7 shows a horizontal crosssection taken along the line VII-VII of Fig. 5 with the window sash released for sliding motion, Fig. 8 shows a detailed view partially in section as taken along the line VIII-VHI in Fig.7, Fig. 9 substantially represents a horizontal section taken along the line IXIX in Fig. 5 with the sash accordingly in its closed state, while Fig. 16 shows a horizontal section taken substantially along the line X--X in Fig. 5 with the window sash in its position of removability.

With reference to the drawings, and particularly to Figs. 1 to 4, reference numeral 1 denotes the top mem ber of the stationary or fixed window frame substantially of box-shaped configuration, 2 represents a lid removably attached to the front of the former, for example, by means of a rib screwed onto its bottom edge, and 3 indicates the two side members of the window frame extended right down to the floor at the inside of the window parapet. The two side members 3 are interconnected at the floor by a bottom member 4 of the frame, while the window sash 5, capable of being slid upwards and downwards, suitably may be composed of two mutually coupled sub-sashes. A window bench 6 is attached to the side members 3 of the window frame and carried by supports 7 as secured to the bottom member 4. A radiator 8 depended from the window bench 6 may be further sustained by the supports 7.

The oppositely related faces of the pair of side members 3 are furnished with guide grooves 16) extending right down to the floor. However, the frame of the sash 5 possesses no fixed parts in engagement with the guide grooves so as to ensure removal of this sash as an inherent unit from the window frame without necessity of detaching any components thereof, while the frame of the sash proper on both sides supports a vertical latch rod 11 having extensions (Figs. 5 and 6) adapted to be moved into engagement with the guide grooves for clamping or for allowing sliding movement of the sash and also to be removed therefrom in response to a corresponding manipulation of the actuating mem:

16 along the edge of the frame of the window sash (Figs. 3

5 and 6) having notches adapted to receive the extensions 12 of the latch rod and the actuating lever (Figs. 7, 9 and 10), which latter by means of an angularly positioned member is pivotally mounted on the latch rod (Fig. 3). member and a plane perpendicular to the latch rod is acute and should preferably be fairly small, 10 degrees, for example. By means of its adjacent member the actuating lever 13 is guided within the angularly shaped recess 18 in the fitting 19 attached to the frame of the sash. By manipulating the actuating lever 13 the latch rod 12 may be set to three different positions either for closing the window, i. e. urging the sash against the window frame, viz. onto the step 20 on the same, for opening the window, that is, sliding the sash, or for removal of the latter out of the frame, whereby the recess 18 constitutes the guide for the actuating lever.

With the actuating lever set to the lower end of the guiding recess 18 (Figs. 5 and 9) the latch rod occupies its closing position with its extensions 12 in clamping engagement with the associated guide groove 10, in which case the window sash is urged against the stop 20 perpendicularly to the plane of the window frame. When positioned within the horizontal portion of the guiding recess in close proximity to its vertical portion as indicated by the dotted circle in Fig. 5 and as viewed in Figs. 6 and 7, the latch rod occupies the position which allows sliding of the window sash with respect to the window frame, whereby the rod extensions slidingly ride along the guide groove, while in its position close to the terminated end of the horizontal portion of the guiding recess, the actuating lever has operated the latch rod to its position of window removability, wherein its extensions are wholly withdrawn from engagement with the associated guide groove. The portion adjacent the slanted pivoting member of the actuating lever is angular, and this means that this lever when set to allow a sliding motion and removal of the window sash (Figs. 6, 7, 8 and 10) has its section nearest to the pivoting member substantially oriented in parallel with the latch rod entirely in the interior of the fitting, while the remaining section thereof projects horizontally through the horizontal portion of the guiding recess, whereas the section nearest to said pivoting member projects through the vertical portion of said recess when the actuating lever is set to its closing position (Figs. 5 and 9).

A transfer of the actuating lever from its position of removal to that which corresponds to a movability of the window sash (compare the dash-lined and dotted circles, respectively, as indicated in Fig. 5) does not alter the position of the lever relative to the latch lever or rod, but in the course of a transfer of the actuating lever from its last-mentioned position to its closing position at the lower end of the vertical portion of the guiding recess, the lever creates a swinging motion relative to the latch rod, whereby the pivoting member acts as the axis of rotation. Now, if this pivoting member had been arranged perpendicular to the latch rod, which might have been a rather reasonable design, there would be no increase of the pressure exerted by the sash toward the window frame during the downward movement of the actuating lever in the guiding recess, unless the left-hand edge of the latter (Fig. 5) against which the said lever rides, is rendered oblique similar to a wedge.

The angle formed between this pivoting .45. However, the bearing arrangement incorporated in the shown embodiment provides an increase of this abovenamed pressure even in connection with a straight downwards extending guiding recess because of the fact, that the section of the actuating lever nearest to the slanted pivoting member during the downwards move of said lever tends to depart from the latch rod (compare Fig. 8), whereas the left-hand edge of the guiding recess (Fig. 5) counteracts such motion and instead imparts a rotational movement to the latch rod through a corresponding angular range which results in an increase of the aforementioned pressure. In other words, the angle formed between the pivoting member and the nearby section of the actuating lever is in the horizontal projection larger in the closing position than in the position to allow sliding or removability of the Window sash. t will readily be understood that this increase of the pressure still may beenhanced by imparting to the said left-hand edge a wedge-like obliquity.

In order to avoid in the course of a transfer of the actuating lever 13 from its closing position, that is, from its lowermost position within'the guiding recess in Fig. 5, to the position allowing a sliding motion of the sash, indicated by the dotted circle in Fig. 5, that this lever inadvertently be operated to its position of removability as indicated by the dash-lined circle in Fig. 5, there has been provided on the inside of the fitting 19 (Figs. 5 and 6) a locking member 22 which is guided vertically displaceable with respect to the fitting by having a knob 23 projecting through a slot in said fitting. This locking member is maintained in its lowermost position by gravity, wherein it projects into the path of the actuating lever 13, so that the latter is prevented from being moved beyond its position corresponding to the sliding state of the sash when the window is opened. After its elevation by means of the knob 23 the locking member has its lower edge resting on the top of the actuating lever, so that the latter readily may be moved to its position of removability.

A pair of substantially frusto-conical pulleys 26 is rotatably mounted in the top or head member 1 of the window (Figs. 1, 2, and 3). The window sash 5 is supported from the larger areas of both pulleys by means of a cord 27 which in the closed state of the window (Fig. 1) is wound around the larger area a suitable number of turns, for example five, and has its end secured to the pulley. To the part of the pulley with smaller area is secured the end of a second cord 28 which is the closed state of the window (Fig. 1) extends a fraction of a revolution around the part of smaller area and thence to the end of a tensional spring 30 having its other end secured to the top or head member 1. In the open state of the window (Fig. 2) with the tensional spring 30 extended, the cord 27 merely runs a fraction of one revolution over pulley part of larger area, while the cord 28 encompasses the smaller area of the pulley a certain number of turns, say five turns. The cords 27 and 28 associated with each of the pulleys 26 may under circumstances be formed by a single continuous cord which directly may pass from the pulley part with larger area to that of smaller area and be secured to the pulley 26 at the point of such passage.

The lower extremities of the cords 27 may be hooked out from their attachments on the window sash 5 when the latter is to be placed on the floor for cleaning, as is indicated by dashed lines in Fig. 3. Contraction of the tensional springs 30 may thereby be prevented by employing some kind of suitable latching facilities. After finished cleaning of the window, the cords 27 are again attached to the window sash, whereupon the latter may be set to its open or closed state.

It will readily be understood that the window frame as well as its window sash or sashes and associated components may be manufactured beforehand in factories and be prepared for mounting, so that they easily may be installed in the building in question within the window parapet or even as a wall component. The window sash may readily be detached from the window frame and all diflicultiesheretofore being encountered in connection with the removal of window sashes have now been overcome by the design as disclosed in the foregoing specification of the present invention.

Obviously, many modifications in the structure disclosed may be made while still retaining the essential cooperative relationship, and I contemplate all such structural changes as coming within the scope of the appended claims.

What I claim is:

1. A sliding window sash in combination with a stationary window frame, a latch rod provided for rotary mounting on said window sash along each vertical side of the same, extensions on the latch rod provided for engagement with the stationary window frame, an angular actuating lever on the latch rod, which lever is pivotally mounted in the latch rod for swinging motion on a transverse axis, and a fitting provided with a steering recess for the actuating lever of the latch and provided for attachment to the Window sash so as to embrace said actuating lever, said actuating lever when occupying a first position in said recess holding the latch rod with its extensions in clamping engagement with the stationary window frame for pressing the slidable window-sash against the stationary window frame in a direction perpendicular to the plane of the window sash, when occupying a second position in said recess holding the latch rod with its extensions in sliding engagement with the stationary window frame, and when occupying a third position in said recess holding the latch rod with its extensions entirely out of engagement with the stationary window frame for removal of the window sash.

2. A sliding window sash in combination with a stationary window frame, a latch rod provided for rotary mounting on said window sash along each vertical side of the same, each latch rod having extensions thereon for engagement with the stationary window frame, an angular actuating lever on the latch rod, which lever is pivotally mounted in the latch rod for swinging motion on a transverse axis, and a fitting provided with an angular steering recess for the actuating lever of the latch and provided for attachment to the window sash so as to embrace said actuating lever and present one portion of its angular recess in a horizontal position and another portion of the same in a vertical position, said actuating lever when occupying the lowermost end of said vertical portion holding the latch rod with its extensions in a position for clamping engagement with the stationary window frame for pressing the slidable window-sash against the stationary window frame in a direction perpendicular to the plane of the slidable window sash, when occupying a section of said recess adjacent to the upper end of said vertical portion holding the latch rod with its extensions in a position for sliding engagement with the stationary window frame, and when occupying a section of said recess at the termination of said horizontal portion holding the latch rod with its extensions entirely out of engagement with the stationary window frame for removal of the window sash.

3. Arrangement as set forth in claim 2, wherein the pivoting member of the actuating lever forms an acute angle with the latch rod, and the adjacent member of said lever presents an angular configuration whereby the actuating lever when set to allow sliding or removal of the window sash has its section nearby said pivoting member substantially in parallel relation with the latch rod in the interior of the fitting, while the remaining section of said lever projects through the horizontal portion of said recess, whereas said section of the actuating lever nearby its pivoting member projects through the vertical portion of said recess when this lever is set to its closing position.

4. Arrangement as set forth in claim 2, wherein the vertical portion of said guiding recess has an oblique edge for co-operation with the actuating lever during its transfer to the closing position to increase the pressure of the sash relative to the window frame during the closing operation.

5. Arrangement as set forth in claim 2, wherein a locking member is provided in the fitting for normally guarding the actuating lever against inadvertent operation to position of removability, said locking member being retractable for allowing such operation.

References Cited in the file of this patent UNITED STATES PATENTS 570,665 Hoffman Nov. 3, 1896 724,134 Smith Mar. 31, 1903 729,665 Robbe June 2, 1903 1,496,148 Cook June 3, 1924 2,169,343 Kaul Aug. 15, 1939 2,604,673 Krocker July 29, 1952 

